Taper of Full-Veneer Crown Preparations by Dental Students at the University of the West Indies

Abstract

This study shows that although the taper achieved by dental students in the University of the West Indies when preparing teeth for full-veneer crowns was outside the ideal range of 4° to 14°, it is comparable to those achieved by dental students in other schools.

Dimensional Measurement for Dentistry

“…The results of this experiment were published by Rafeek et al, (2010). There were no undercuts detected on any of the laboratory specimens as compared to the clinical specimens where 12.5% were undercut.…”

“…Although dimensional measurements have been widely applied in dental research, for some of the measurements, such as taper angle measurement, a consensus has been demonstrated (Noonan & Goldfogel, 1991;Sato et al, 1998;Patel et al, 2005;Ayad et al, 2005;Mack, 1980;Rafeek et al, 2006Rafeek et al, , 2010. In other areas, such as tooth wear measurements (Zhou and Zheng, 2008;Pintado MR et al, 2000;Mitchell and Chadwick, 1998) this has not been the case.…”

“…Metrology has also been used in dentistry to measure the amount of tooth wear on the surface of a tooth. Specifically in the preparation of crowns, it has been used previously to measure the width of the crown preparation margin, the angulation of the margin (Seymour et al,1996, Cherukara et al, 2002 and the taper angle formed when a tooth is prepared for a crown (Rafeek et al, 2006(Rafeek et al, , 2010.…”

Convergence Angles of Clinical Tooth Preparations for Metal Ceramic Restorations Among Dental Students and General Practitioners

“…Mack (21) observed that a minimal taper of 12 degrees was necessary to ensure the absence of undercuts. The widely recommended 12°TOC has been Copyright shown to be difficult to achieve for many dental students (22)(23)(24).…”

Considerations Regarding Preparation for Porcelain-fused-tometal Crowns

“…Quality of tooth preparation is influenced by occlusal reduction, axial reduction, occlusal convergence, aspect of cervical preparation and axial walls. There are many studies that analyse the quality of tooth preparation for coverage crowns done by students [3][4][5], dentists [6], residents [5] or specialists [7]. Majority of these evaluates TOC, neglecting other aspects of preparation, which are most commonly errors denounced by dental laboratories [8].…”